Lightweight and compact size to store or carry. Simple to operate and easy to install. It helps protect your bicycle well, and you don't need to worry about losing it. What are you waiting for?Features:Adopted high quality PC material shell, IP 55 waterproof, can use for outdoor.Knocking the door or window can trigger the alarm, which protects your life safety more effectively.Emergency help, sound SOS will remind you of asking help when the accident happens.More accurate catch the theft using three-dimensional displacement sensors and special algorithms. Protect your property safety.Two install methods for you to choose, pasting with double-sided sticker or tie it with strap.Super loud alarm and 7 level adjustable sensitivity, reliable to use.Wireless remote control operation, easier to use, very practical.Compact, small size and classic design for easy to carry.Specification:Condition: 100% Brand NewMaterial: PCColor: BlackAlarm size: 9.5 * 4.1 * 2cm / 3.7 * 1.6 * 0.8inRemote controller size: 6 * 3 * 1cm / 2.4 * 1.2 * 0.4inAlarm Volume: 113dBWaterproof: IP55Loudspeaker Batteries: 3 * 1.5V AAARemote Controller: 1 * 12V 27ABell Sound Types: 6Working Environment Temperature: -20~60Working Environment: <80%Storage Temperature: -30-+70Package Weight: Approx. 125g / 4.4ozPackage Included:1 * Bicycle Vibration Alarm1 * Remote Controller5 * AccessoriesNote:1. The correct installation of this product is waterproof, but not immersed in water.2. Please allow 0.5-1 inch difference due to manual measurement. Thanks for your understanding. (1 inch=2.54cm)